<template>
  <div class="app-container">
        <h2 style="text-align: center;">发布新课程</h2>
        <el-steps :active="3" process-status="wait" align-center style="margin-bottom: 40px;">
        <el-step title="填写课程基本信息"/>
        <el-step title="创建课程大纲"/>
        <el-step title="最终发布"/>
        </el-steps>

        <div class="ccInfo">
        <img :src="coursePublish.cover">
            <div class="main">
                <h2>{{ coursePublish.title }}</h2>
                <p class="gray"><span>共 {{ coursePublish.lessonNum }} 课时</span></p>
                <p><span>所属分类：{{ coursePublish.subjectLevelOne }} — {{ coursePublish.subjectLevelTwo }}</span></p>
                <p>课程讲师：{{ coursePublish.teacherName }}</p>
                <h3 class="red">￥{{ coursePublish.price }}</h3>
            </div>
        </div>

        <div>
            <el-button @click="previous">返回修改</el-button>
            <el-button :disabled="saveBtnDisabled" type="primary" @click="publish">发布课程</el-button>
        </div>
    </div>
</template>

<script>
    import courseApi from '@/api/edu/course'

    export default {
        data() {
            return {
                courseId: '',
                saveBtnDisabled: false, // 保存按钮是否禁用
                coursePublish: {}
            }
        },
        created() {
            //获取路由中的id
            if(this.$route.params && this.$route.params.id) {
                this.courseId = this.$route.params.id
                //调用接口方法根据课程id查询
                this.getPublishCourseInfoById()
            }
        },
        methods: {
            //根据课程id查询
            getPublishCourseInfoById() {
                courseApi.getPublishCourseInfo(this.courseId)
                    .then(response => {
                        this.coursePublish = response.data.coursePublishVo
                    })
            },
            previous() {
                this.$router.push({ path: '/course/chapter/' + this.courseId })
            },
            publish() {
                this.$confirm('是否发布课程？', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).then( () => {
                    courseApi.publishCourse(this.courseId)
                        .then(response => {
                            //提示
                            this.$message({
                                type: 'success',
                                message: '发布成功!'
                            })
                            //回到列表页面
                            this.$router.push({ path: '/course/list' })
                        })
                })
                
            }
        }
    }
</script>

<style scoped>
    .ccInfo {
        background: #f5f5f5;
        padding: 20px;
        overflow: hidden;
        border: 1px dashed #DDD;
        margin-bottom: 40px;
        position: relative;
    }
    .ccInfo img {
        background: #d6d6d6;
        width: 500px;
        height: 278px;
        display: block;
        float: left;
        border: none;
    }
    .ccInfo .main {
        margin-left: 520px;
    }
    .ccInfo .main h2 {
        font-size: 28px;
        margin-bottom: 30px;
        line-height: 1;
        font-weight: normal;
    }
    .ccInfo .main p {
        margin-bottom: 10px;
        word-wrap: break-word;
        line-height: 24px;
        max-height: 48px;
        overflow: hidden;
    }
    .ccInfo .main p {
        margin-bottom: 10px;
        word-wrap: break-word;
        line-height: 24px;
        max-height: 48px;
        overflow: hidden;
    }
    .ccInfo .main h3 {
        left: 540px;
        bottom: 20px;
        line-height: 1;
        font-size: 28px;
        color: #d32f24;
        font-weight: normal;
        position: absolute;
    }
</style>